Paint roller



FIG. 1 is a left side view of a paint roller showing our design;

FIG. 2 is top plan view thereof;

FIG. 3 is a left side view of a second embodiment of FIG. 1;

FIG. 4 is a top plan view of FIG. 3;

FIG. 5 is a left side view of a third embodiment of FIG. 1; and,

FIG. 6 is a top plan view of FIG. 5.

The undisclosed bottom, front, rear and right side views form no part of the claimed design. 

The ornamental design for a paint roller, as shown and described. 